Air-heating drum.



No. 798,809. PATENTED SEPT. 5, 1905. G. E. LEONARD.

AIR HEATING DRUM.

APPLIOATION I'ILED MAR. 20, 1905.

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"0 G'eoryelfllwrzarai No. 798,809. PATENTED SEPT. 5, 1905. G. B. LEONARD.

AIR HEATING DRUM.

APPLICATION run]: MAR. 20, 1905.

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ATTORNE GEORGE E. LEONARD, OF SHERIDAN, \VISOONSIN.

AIR-HEATING DRUM.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed March 20, 1905. Serial No. 251,038.

To a]! 110L017], it may concern.-

Be it known that I, GEORGE E. LEONARD, a citizen of the United States, and a resident of Sheridan,in the county of \Vaupaca and State of Wisconsin, have invented a new and Improved Air-Heating Drum, of which the following is a full, clear, and exact description.

The invention relates to heating-stoves having a tubular heating-d rum, such,'for instance, as shown and described in the Letters Patent of the United States, No. 417,874, granted to me December QT, 1889.

The object of the present invention is to provide a new and improved air-heating drum for stoves arranged to support the tubular heating-drum on a comparatively cool surface by causing a rapid circulation of air through the heating-d rum and providing the top thereof with an asbestos filling.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a perspective view of a stove provided with the improvement. Fig. 2 is side elevation of the improvement. Fig. 3 is a plan view of the same, and Fig. a is a sectional side elevation of the same on the line 4 a of Fig. 5).

The lire-box or combustion-chamber A of the stove supports on its top an air-heating drum B, carrying a tubular radiating-drum O of the construction shown and described in the Letters Patent of the United States above referred to. From the upper end of the firebox A leads a chimney-flue D, having a suitable damper E, and from the top of the tubular radiating-drum O leads a branch pipe F to the chimney-flue D. Through the airheating drum B extends a tube G to allow a portion of the smoke and gases arising from the burning fuel in the fire-box A to pass to the tubular radiating-drum O.

The air-heating drum Bis preferably made of three partsnamely, a bottom ring B, litted on the upper end of the tire-box A and having in its top an opening and support for the centrally-located flue G previously mentioned. On the top of the ring B is set an aii=chamber B supporting a cover B on which rests the tubular rzuliating-drurn O. In the side wall of the chamber B near the lower end thereof, are arranged air-inlet openings B, and air-outlet openings B" are arranged in the side wall, near the top thereof, so that air can pass into the air-chamber B by way of the inlets B and pass out through the outlets B".

In order to insure a quick circulation of the air through the chamber B", the cover B is preferably in the form of an inverted cone, so as to direct theair rising in the chamber B to the outlets B" for the air to quickly escape after circulating through the chamber 15". The cone-shaped portion B of the cover B is provided on its top with a lilling or lining H, of asbestos or other non-heat-conducting material, which provides a comparatively cool surface for the under side of the tubular rzuliating-drum O to prevent the latter from being easily destroyed by the heat and gases passing from the lire-box A through the flue G into and through the radiating-drum O.

In order to regulate the amount of smoke and gases passing up through the flue G, as described, a suitable damper l is provided, operated from the outside by having its stem extending through one of the air-inlets B to the outside of the heating-drum to permit the operator to conveniently manipulate the damper whenever it is desired to do so.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. An air-heating device for stoves, comprising an air-heating drum, resting upon the stove, provided with air inlet and exit openings, and a radiating-drum supported by said heatin g-d r u m.

2. An air-heating device for stoves, comprising an air-heating drum, resting upon the stove, provided with air inlet and exit openings, and a radiatirig-drum supported by said heating-drum, said first-named drum being provided interiorly with a deflector.

3. An air-heating device for stoves, comprising an air-heating drum, resting upon the stove, provided with air inlet and exit openings, and a radiating-drum supported by said heating-drum, said first-named drum being provided with a central flue extending through the same.

4. An air-heating device for stoves, comprising an air-heating drum, resting upon the stove, provided With air inlet and exit openscribing witnesses. ings, and a radiating-drum supported by said GEORGE E. LEONARD.

5 heating-drum, said first-named drum being Witnesses:

provided interiorly with an inverted conical M. B. SCOTT,

deflector. JoHN VELIE.

In testimony whereof I have signed my name to this specification in the presence of two sub- 

